 the home plane of most mortals this plane consists of an innumerable number of worlds each located within its own crystal sphere these crystal spheres float within the phlogiston a flammable substance that fills the remainder of the space almost as an ocean with currents allowing for ease of travel between certain spheres travel from one sphere to another within the prime is most often accomplished through the use of spelljammer spelljammers; magical ships that use the power of a spellcaster to propel themselves through the void this plane is located in some sense in the center of the multiverse laying coterminous to both the astral plane astral and ethereal plane planes allowing access to both the category outer planes outer and category inner planes inner planes it is here that most power powers draw their power from as most of their faithful make their kip on the prime dwellers from the prime who travel on the planes are often referred to as clueless due to the common misconceptions primes have about the planes and the gape-mouthed expression many hold when traveling within them list of prime worlds list of prime worlds list of prime worlds abeir-toril aebrynis aelos athas known world krynn oerth ortho ranais rock of bral terras worlds above and below unnamed prime worlds category planes category prime material plane # 